Silicon nitride milling bit insert | |||
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Silicon nitride milling bit insert. Milling bit insert, similar to the common tungsten carbide type, except made of silicon nitride instead. Source: eBay seller dixielandemporium Contributor: Theodore Gray Acquired: 24 March, 2009 Text Updated: 25 March, 2009 Price: $9 Size: 0.5" Composition: Si3N4 | |||
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